Re: fuse jumping 101 - Saab 900 Bulletin Board - Saabnet.com
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Re: fuse jumping 101
Posted by JohnK (more from JohnK) on Sun, 12 Dec 2004 06:31:41
In Reply to: Re: Rough Start Up, Matt, Fri, 10 Dec 2004 15:08:34
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Open the fuse box and touch a section of wire to the tops of fuse number 30 and fuse number 27 with ignition off. This will run your fuel pump without the engine running to get fuel pressure up. Thin wire gets warm so use 14 or 12 gauge wire.
Normally, the fuel pump relies on a tach signal from the Hall Effect sender to trigger the ECU to close the fuel pump relay...while cranking. The 27 to 30 jumper bypasses the ECU and relay to send power directly to the pump without cranking.
posted by 68.37.183...
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